Joe Burrow's professional women's volleyball league just added some serious firepower ... Olympic legend Kerri Walsh Jennings has now come on board -- and she's bringing a team with her!!
Walsh Jennings -- a three-time Olympic gold medalist -- announced the move earlier this week ... and told TMZ Sports on Thursday she's absolutely fired up to partner with the Bengals quarterback and others in the new league.
If you're unfamiliar, Burrow helped launch the Pro Volleyball Federation earlier this year .